Hi guys, I'm looking at different configuration options for my new iMac. My current iMac (Mid 2010) still works fine, but it becomes a little slow sometimes, mainly when launching the OS or applications. As a student, I'm eligible for the student discount via Apple, so the prices down below are not the regular prices. I still can't decide which configuration to choose or what parts to invest in. I mostly use my Mac for basic tasks like e-mailing, browsing the web, Photoshop (light work), Premiere (light work) and DJ'ing (Serato DJ). I hope someone can help me out. These are my options: iMac 4K 21.5" 3.0 Ghz i5 16 GB RAM 512 GB SSD Radeon Pro 555 2 GB € 2.086,04 3.4 Ghz i5 16 GB RAM 512 GB SSD Radeon Pro 560 4 GB € 2.161,06 iMac 5K 27" 3.4 Ghz i5 8 GB RAM 512 GB SSD Radeon Pro 570 4 GB € 2.312,31 Which configuration do you guys think is the best choice for me?